Switching Accounts and Transferring Music

[eve_ah]

I used to share a premium account with my family, but eventaully we got fed up with cutting eachother off when we tried to listen to music at the same time. We are in the process of switching to a family plan now, but I have all my music saved under the original account (most of it is not in a playlist). Since the original account is technically my mothers and has all of her information in it I have to create my own account to link to the family plan, but I dont really want to go through by hand and redownload all 10,000 of my songs. Everyone elses music is minimal in comparison so I don't really care about having their music saved to my account as well. Im just looking for an easy way to transfer downloaded music from our old account to my new one.